English
The (infinite) inseparable degree of E over F is the rank of E over SeparableClosure F E.
Русский
Несепарабельная степень E над F равна рангу E как модуля над сепарабельным замыканием SeparableClosure(F,E).
LaTeX
$$$\\mathrm{insepDegree}(F,E) = \\operatorname{rank}_{\\mathrm{separableClosure}(F,E)} E$$$
Lean4
/-- The (infinite) inseparable degree for a general field extension `E / F` is defined
to be the degree of `E / separableClosure F E`. -/
@[stacks 030L "Part 2"]
def insepDegree :=
Module.rank (separableClosure F E) E